Fig. 500
The toy works in this way. If it is placed on the floor and the string held, the weight of the toy will make the twine unwind, thus causing the elastic which supports the reel to twist. When the string is slackened, the elastic will untwist again, making the reel revolve and the toy run along the ground.
Figs. 499 and 500 show a black beetle that can be made in the same way; the antennæ may be made of wire. Other suitable animals are a lizard and a crocodile.
Fig. 501
Fig. 502
